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enchant.js
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enchant.js
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/**
* enchant.js v0.4.3
*
* Copyright (c) Ubiquitous Entertainment Inc.
* Dual licensed under the MIT or GPL Version 3 licenses
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
if (typeof Object.defineProperty != 'function') {
Object.defineProperty = function(obj, prop, desc) {
if ('value' in desc) obj[prop] = desc.value;
if ('get' in desc) obj.__defineGetter__(prop, desc.get);
if ('set' in desc) obj.__defineSetter__(prop, desc.set);
return obj;
};
}
if (typeof Object.defineProperties != 'function') {
Object.defineProperties = function(obj, descs) {
for (var prop in descs) if (descs.hasOwnProperty(prop)) {
Object.defineProperty(obj, prop, descs[prop]);
}
return obj;
};
}
if (typeof Object.create != 'function') {
Object.create = function(prototype, descs) {
function F() {};
F.prototype = prototype;
var obj = new F();
if (descs != null) Object.defineProperties(obj, descs);
return obj;
};
}
if (typeof Object.getPrototypeOf != 'function') {
Object.getPrototypeOf = function(obj) {
return obj.__proto__;
};
}
/**
* Export library classes globally.
*
* When no arguments are delivered, all classes defined in enchant.js as well as all classes defined in
* plugins will be exported. When more than one argument is delivered, by default only classes defined
* in enchant.js will be exported. When you wish to export plugin classes you must explicitly deliver * * plugin identifiers as arguments.
*
* @example
* enchant(); // All classes will be exported.
* enchant(''); // Only classes in enchant.js will be exported.
* enchant('ui'); // enchant.js classes and ui.enchant.js classes will be exported.
*
* @param {...String} [modules] Export module. Multiple designations possible.
*/
var enchant = function(modules) {
if (modules != null) {
if (!(modules instanceof Array)) {
modules = Array.prototype.slice.call(arguments);
}
modules = modules.filter(function(module) {
return [module].join();
});
}
(function include(module, prefix) {
var submodules = [];
for (var prop in module) if (module.hasOwnProperty(prop)) {
if (typeof module[prop] == 'function') {
window[prop] = module[prop];
} else if (typeof module[prop] == 'object' && Object.getPrototypeOf(module[prop]) == Object.prototype) {
if (modules == null) {
submodules.push(prop);
} else {
i = modules.indexOf(prefix + prop);
if (i != -1) {
submodules.push(prop);
modules.splice(i, 1);
}
}
}
}
for (var i = 0, len = submodules.length; i < len; i++) {
include(module[submodules[i]], prefix + submodules[i] + '.');
}
})(enchant, '');
if (modules != null && modules.length) {
throw new Error('Cannot load module: ' + modules.join(', '));
}
};
(function() {
"use strict";
var VENDER_PREFIX = (function() {
var ua = navigator.userAgent;
if (ua.indexOf('Opera') != -1) {
return 'O';
} else if (ua.indexOf('MSIE') != -1) {
return 'ms';
} else if (ua.indexOf('WebKit') != -1) {
return 'webkit';
} else if (navigator.product == 'Gecko') {
return 'Moz';
} else {
return '';
}
})();
var TOUCH_ENABLED = (function() {
var div = document.createElement('div');
div.setAttribute('ontouchstart', 'return');
return typeof div.ontouchstart == 'function';
})();
var RETINA_DISPLAY = (function() {
if (navigator.userAgent.indexOf('iPhone') != -1 && window.devicePixelRatio == 2) {
var viewport = document.querySelector('meta[name="viewport"]');
if (viewport == null) {
viewport = document.createElement('meta');
document.head.appendChild(viewport);
}
viewport.setAttribute('content', 'width=640px');
return true;
} else {
return false;
}
})();
// the running instance
var game;
/**
* Class Classes
*
* @param {Function} [superclass] Successor class.
* @param {*} definition Class definition.
* @constructor
*/
enchant.Class = function(superclass, definition) {
return enchant.Class.create(superclass, definition);
};
/**
* Create class.
*
* When making classes that succeed other classes, the previous class is used as a base with
* constructor as default. In order to override the constructor, it is necessary to explicitly
* call up the previous constructor to use it.
*
* @example
* var Ball = Class.create({ // Creates independent class.
* initialize: function(radius) { ... }, // Method definition.
* fall: function() { ... }
* });
*
* var Ball = Class.create(Sprite); // Creates a class succeeding "Sprite"
* var Ball = Class.create(Sprite, { // Creates a class succeeding "Sprite"
* initialize: function(radius) { // Overwrites constructor
* Sprite.call(this, radius*2, radius*2); // Applies previous constructor.
* this.image = game.assets['ball.gif'];
* }
* });
*
* @param {Function} [superclass] Preceding class.
* @param {*} [definition] Class definition.
* @static
*/
enchant.Class.create = function(superclass, definition) {
if (arguments.length == 0) {
return enchant.Class.create(Object, definition);
} else if (arguments.length == 1 && typeof arguments[0] != 'function') {
return enchant.Class.create(Object, arguments[0]);
}
for (var prop in definition) if (definition.hasOwnProperty(prop)) {
if (typeof definition[prop] == 'object' && Object.getPrototypeOf(definition[prop]) == Object.prototype) {
if (!('enumerable' in definition[prop])) definition[prop].enumerable = true;
} else {
definition[prop] = { value: definition[prop], enumerable: true, writable: true };
}
}
var constructor = function() {
if (this instanceof constructor) {
constructor.prototype.initialize.apply(this, arguments);
} else {
return new constructor();
}
};
constructor.prototype = Object.create(superclass.prototype, definition);
constructor.prototype.constructor = constructor;
if (constructor.prototype.initialize == null) {
constructor.prototype.initialize = function() {
superclass.apply(this, arguments);
};
}
return constructor;
};
/**
* @scope enchant.Event.prototype
*/
enchant.Event = enchant.Class.create({
/**
* A class for independent event implementation like DOM Events.
* However, does not include phase concept.
* @param {String} type Event type.
* @constructs
*/
initialize: function(type) {
/**
* Event type.
* @type {String}
*/
this.type = type;
/**
* Event target.
* @type {*}
*/
this.target = null;
/**
* Event occurrence's x coordinates.
* @type {Number}
*/
this.x = 0;
/**
* Event occurrence's y coordinates.
* @type {Number}
*/
this.y = 0;
/**
* X coordinates for event occurrence standard event-issuing object.
* @type {Number}
*/
this.localX = 0;
/**
* Y coordinates for event occurrence standard event-issuing object.
* @type {Number}
*/
this.localY = 0;
},
_initPosition: function(pageX, pageY) {
this.x = this.localX = (pageX - game._pageX) / game.scale;
this.y = this.localY = (pageY - game._pageY) / game.scale;
}
});
/**
* Event activated upon completion of game loading.
*
* It is necessary to wait for loading to finish and to do initial processing when preloading images.
* Issued object: enchant.Game
*
* @example
* var game = new Game(320, 320);
* game.preload('player.gif');
* game.onload = function() {
* ... // Describes initial game processing
* };
* game.start();
*
* @type {String}
*/
enchant.Event.LOAD = 'load';
/**
* Events occurring during game loading.
* Activated each time a preloaded image is loaded. Issued object: enchant.Game
* @type {String}
*/
enchant.Event.PROGRESS = 'progress';
/**
* Events occurring during frame start.
* Issued object: enchant.Game, enchant.Node
* @type {String}
*/
enchant.Event.ENTER_FRAME = 'enterframe';
/**
* Events occurring during frame end.
* Issued object: enchant.Game
* @type {String}
*/
enchant.Event.EXIT_FRAME = 'exitframe';
/**
* Events occurring during Scene beginning.
* Issued object: enchant.Scene
* @type {String}
*/
enchant.Event.ENTER = 'enter';
/**
* Events occurring during Scene end.
* Issued object: enchant.Scene
* @type {String}
*/
enchant.Event.EXIT = 'exit';
/**
* Event occurring when Node is added to Group.
* Issued object: enchant.Node
* @type {String}
*/
enchant.Event.ADDED = 'added';
/**
* Event occurring when Node is added to Scene.
* Issued object: enchant.Node
* @type {String}
*/
enchant.Event.ADDED_TO_SCENE = 'addedtoscene';
/**
* Event occurring when Node is deleted from Group.
* Issued object: enchant.Node
* @type {String}
*/
enchant.Event.REMOVED = 'removed';
/**
* Event occurring when Node is deleted from Scene.
* Issued object: enchant.Node
* @type {String}
*/
enchant.Event.REMOVED_FROM_SCENE = 'removedfromscene';
/**
* Event occurring when touch corresponding to Node has begun.
* Click is also treated as touch. Issued object: enchant.Node
* @type {String}
*/
enchant.Event.TOUCH_START = 'touchstart';
/**
* Event occurring when touch corresponding to Node has been moved.
* Click is also treated as touch. Issued object: enchant.Node
* @type {String}
*/
enchant.Event.TOUCH_MOVE = 'touchmove';
/**
* Event occurring when touch corresponding to touch has ended.
* Click is also treated as touch. Issued object: enchant.Node
* @type {String}
*/
enchant.Event.TOUCH_END = 'touchend';
/**
* Event occurring when Entity is rendered.
* Issued object: enchant.Entity
* @type {String}
*/
enchant.Event.RENDER = 'render';
/**
* Event occurring when button is pushed.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.INPUT_START = 'inputstart';
/**
* Event occurring when button input changes.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.INPUT_CHANGE = 'inputchange';
/**
* Event occurring when button input ends.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.INPUT_END = 'inputend';
/**
* Event occurring when left button is pushed.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.LEFT_BUTTON_DOWN = 'leftbuttondown';
/**
* Event occurring when left button is released.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.LEFT_BUTTON_UP = 'leftbuttonup';
/**
* Event occurring when right button is pushed.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.RIGHT_BUTTON_DOWN = 'rightbuttondown';
/**
* Event occurring when right button is released.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.RIGHT_BUTTON_UP = 'rightbuttonup';
/**
* Even occurring when up button is pushed.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.UP_BUTTON_DOWN = 'upbuttondown';
/**
* Event occurring when up button is released.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.UP_BUTTON_UP = 'upbuttonup';
/**
* Event occurring when down button is pushed.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.DOWN_BUTTON_DOWN = 'downbuttondown';
/**
* Event occurring when down button is released.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.DOWN_BUTTON_UP = 'downbuttonup';
/**
* Event occurring when a button is pushed.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.A_BUTTON_DOWN = 'abuttondown';
/**
* Event occurring when a button is released.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.A_BUTTON_UP = 'abuttonup';
/**
* Event occurring when b button is pushed.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.B_BUTTON_DOWN = 'bbuttondown';
/**
* Event occurring when b button is released.
* Issued object: enchant.Game, enchant.Scene
* @type {String}
*/
enchant.Event.B_BUTTON_UP = 'bbuttonup';
/**
* @scope enchant.EventTarget.prototype
*/
enchant.EventTarget = enchant.Class.create({
/**
* A class for independent event implementation like DOM Events.
* However, does not include phase concept.
* @constructs
*/
initialize: function() {
this._listeners = {};
},
/**
* Add EventListener.
* @param {String} type Event type.
* @param {function(e:enchant.Event)} listener EventListener added.
*/
addEventListener: function(type, listener) {
var listeners = this._listeners[type];
if (listeners == null) {
this._listeners[type] = [listener];
} else if (listeners.indexOf(listener) == -1) {
listeners.unshift(listener);
}
},
/**
* Delete EventListener.
* @param {String} type Event type.
* @param {function(e:enchant.Event)} listener EventListener deleted.
*/
removeEventListener: function(type, listener) {
var listeners = this._listeners[type];
if (listeners != null) {
var i = listeners.indexOf(listener);
if (i != -1) {
listeners.splice(i, 1);
}
}
},
/**
* Clear EventListener.
* @param {String} type Event type.
*/
clearEventListener: function(type) {
if(type != null){
delete this._listeners[type];
}else{
this._listeners = {};
}
},
/**
* Issue event.
* @param {enchant.Event} e Event issued.
*/
dispatchEvent: function(e) {
e.target = this;
e.localX = e.x - this._offsetX;
e.localY = e.y - this._offsetY;
if (this['on' + e.type] != null) this['on' + e.type]();
var listeners = this._listeners[e.type];
if (listeners != null) {
listeners = listeners.slice();
for (var i = 0, len = listeners.length; i < len; i++) {
listeners[i].call(this, e);
}
}
}
});
/**
* @scope enchant.Game.prototype
*/
enchant.Game = enchant.Class.create(enchant.EventTarget, {
/**
* Class controlling game main loop, scene.
*
* There can be only one instance, and when the constructor is executed
* with an instance present, the existing item will be overwritten. The existing instance
* can be accessed from enchant.Game.instance.
*
* @param {Number} width Game screen width.
* @param {Number} height Game screen height.
* @constructs
* @extends enchant.EventTarget
*/
initialize: function(width, height) {
if (window.document.body === null){
throw new Error("document.body is null. Please excute 'new Game()' in window.onload.");
}
enchant.EventTarget.call(this);
var initial = true;
if (game) {
initial = false;
game.stop();
}
game = enchant.Game.instance = this;
/**
* Game screen width.
* @type {Number}
*/
this.width = width || 320;
/**
* Game screen height.
* @type {Number}
*/
this.height = height || 320;
/**
* Game display scaling.
* @type {Number}
*/
this.scale = 1;
var stage = document.getElementById('enchant-stage');
if (!stage) {
stage = document.createElement('div');
stage.id = 'enchant-stage';
stage.style.width = window.innerWidth + 'px';
stage.style.height = window.innerHeight + 'px';
stage.style.position = 'absolute';
if (document.body.firstChild) {
document.body.insertBefore(stage, document.body.firstChild);
} else {
document.body.appendChild(stage);
}
this.scale = Math.min(
window.innerWidth / this.width,
window.innerHeight / this.height
);
this._pageX = 0;
this._pageY = 0;
} else {
var style = window.getComputedStyle(stage);
width = parseInt(style.width);
height = parseInt(style.height);
if (width && height) {
this.scale = Math.min(
width / this.width,
height / this.height
);
} else {
stage.style.width = this.width + 'px';
stage.style.height = this.height + 'px';
}
while (stage.firstChild) {
stage.removeChild(stage.firstChild);
}
stage.style.position = 'relative';
var bounding = stage.getBoundingClientRect();
this._pageX = Math.round(window.scrollX + bounding.left);
this._pageY = Math.round(window.scrollY + bounding.top);
}
if (!this.scale) this.scale = 1;
stage.style.fontSize = '12px';
stage.style.webkitTextSizeAdjust = 'none';
this._element = stage;
/**
* Game frame rate.
* @type {Number}
*/
this.fps = 30;
/**
* Number of frames from game start.
* @type {Number}
*/
this.frame = 0;
/**
* Game executability (valid or not).
* @type {Boolean}
*/
this.ready = null;
/**
* Game execution state (valid or not).
* @type {Boolean}
*/
this.running = false;
/**
* Object saved as loaded image path key.
* @type {Object.<String, Surface>}
*/
this.assets = {};
var assets = this._assets = [];
(function detectAssets(module) {
if (module.assets instanceof Array) {
[].push.apply(assets, module.assets);
}
for (var prop in module) if (module.hasOwnProperty(prop)) {
if (typeof module[prop] == 'object' && Object.getPrototypeOf(module[prop]) == Object.prototype) {
detectAssets(module[prop]);
}
}
})(enchant);
this._scenes = [];
/**
* Current Scene. Scene at top of Scene stack.
* @type {enchant.Scene}
*/
this.currentScene = null;
/**
* Route Scene. Scene at bottom of Scene stack.
* @type {enchant.Scene}
*/
this.rootScene = new enchant.Scene();
this.pushScene(this.rootScene);
/**
* Scene displayed during loading.
* @type {enchant.Scene}
*/
this.loadingScene = new enchant.Scene();
this.loadingScene.backgroundColor = '#000';
var barWidth = this.width * 0.9 | 0;
var barHeight = this.width * 0.3 | 0;
var border = barWidth * 0.05 | 0;
var bar = new enchant.Sprite(barWidth, barHeight);
bar.x = (this.width - barWidth) / 2;
bar.y = (this.height - barHeight) / 2;
var image = new enchant.Surface(barWidth, barHeight);
image.context.fillStyle = '#fff';
image.context.fillRect(0, 0, barWidth, barHeight);
image.context.fillStyle = '#000';
image.context.fillRect(border, border, barWidth - border*2, barHeight - border*2);
bar.image = image;
var progress = 0, _progress = 0;
this.addEventListener('progress', function(e) {
progress = e.loaded / e.total;
});
bar.addEventListener('enterframe', function() {
_progress *= 0.9;
_progress += progress * 0.1;
image.context.fillStyle = '#fff';
image.context.fillRect(border, 0, (barWidth - border*2) * _progress, barHeight);
});
this.loadingScene.addChild(bar);
this._mousedownID = 0;
this._surfaceID = 0;
this._soundID = 0;
this._intervalID = null;
/**
* Object that saves input conditions for game.
* @type {Object.<String, Boolean>}
*/
this.input = {};
this._keybind = {};
this.keybind(37, 'left'); // Left Arrow
this.keybind(38, 'up'); // Up Arrow
this.keybind(39, 'right'); // Right Arrow
this.keybind(40, 'down'); // Down Arrow
var c = 0;
['left', 'right', 'up', 'down', 'a', 'b'].forEach(function(type) {
this.addEventListener(type + 'buttondown', function(e) {
if (!this.input[type]) {
this.input[type] = true;
this.dispatchEvent(new enchant.Event((c++) ? 'inputchange' : 'inputstart'));
}
this.currentScene.dispatchEvent(e);
});
this.addEventListener(type + 'buttonup', function(e) {
if (this.input[type]) {
this.input[type] = false;
this.dispatchEvent(new enchant.Event((--c) ? 'inputchange' : 'inputend'));
}
this.currentScene.dispatchEvent(e);
});
}, this);
if (initial) {
document.addEventListener('keydown', function(e) {
game.dispatchEvent(new enchant.Event('keydown'));
if ((37 <= e.keyCode && e.keyCode <= 40) || e.keyCode == 32) {
e.preventDefault();
e.stopPropagation();
}
if (!game.running) return;
var button = game._keybind[e.keyCode];
if (button) {
var e = new enchant.Event(button + 'buttondown');
game.dispatchEvent(e);
}
}, true);
document.addEventListener('keyup', function(e) {
if (!game.running) return;
var button = game._keybind[e.keyCode];
if (button) {
var e = new enchant.Event(button + 'buttonup');
game.dispatchEvent(e);
}
}, true);
if (TOUCH_ENABLED) {
document.addEventListener('touchstart', function(e) {
e.preventDefault();
}, true);
document.addEventListener('touchmove', function(e) {
e.preventDefault();
if (!game.running) e.stopPropagation();
}, true);
document.addEventListener('touchend', function(e) {
e.preventDefault();
if (!game.running) e.stopPropagation();
}, true);
} else {
document.addEventListener('mousedown', function(e) {
e.preventDefault();
game._mousedownID++;
if (!game.running) e.stopPropagation();
}, true);
document.addEventListener('mousemove', function(e) {
e.preventDefault();
if (!game.running) e.stopPropagation();
}, true);
document.addEventListener('mouseup', function(e) {
e.preventDefault();
if (!game.running) e.stopPropagation();
}, true);
}
}
},
/**
* Performs file preload.
*
* enchant is a file set to execute preload. It is loaded when
* Game#start is activated. When all files are loaded, load events are activated
* from Game objects. When an image file is from Game object assets properties,
* it will as a Surface object, or a Sound object for sound files,
* and in other cases it will be accessible as string.
*
* In addition, because this Surface object used made with enchant.Surface.load,
* direct object manipulation is not possible. Refer to the items of enchant.Surface.load
*
* @example
* game.preload('player.gif');
* game.onload = function() {
* var sprite = new Sprite(32, 32);
* sprite.image = game.assets['player.gif']; // Access via path
* ...
* };
* game.start();
*
* @param {...String} assets Preload image path. Multiple settings possible.
*/
preload: function(assets) {
if (!(assets instanceof Array)) {
assets = Array.prototype.slice.call(arguments);
}
[].push.apply(this._assets, assets);
},
/**
* File loading.
*
* @param {String} asset Load file path.
* @param {Function} [callback] Function called up when file loading is finished.
*/
load: function(src, callback) {
if (callback == null) callback = function() {};
var ext = src.match(/\.\w+$/)[0];
if (ext) ext = ext.slice(1).toLowerCase();
switch (ext) {
case 'jpg':
case 'gif':
case 'png':
game.assets[src] = enchant.Surface.load(src);
game.assets[src].addEventListener('load', callback);
break;
case 'mp3':
case 'aac':
case 'm4a':
case 'wav':
case 'ogg':
game.assets[src] = enchant.Sound.load(src, 'audio/' + ext);
game.assets[src].addEventListener('load', callback);
break;
default:
var req = new XMLHttpRequest();
req.open('GET', src, true);
req.onreadystatechange = function(e) {
if (req.readyState == 4) {
if (req.status != 200 && req.status != 0) {
throw new Error(req.status + ': ' + 'Cannot load an asset: ' + src);
}
var type = req.getResponseHeader('Content-Type') || '';
if (type.match(/^image/)) {
game.assets[src] = enchant.Surface.load(src);
game.assets[src].addEventListener('load', callback);
} else if (type.match(/^audio/)) {
game.assets[src] = enchant.Sound.load(src, type);
game.assets[src].addEventListener('load', callback);
} else {
game.assets[src] = req.responseText;
callback();
}
}
};
req.send(null);
}
},
/**
* Begin game.
*
* Obeying the frame rate set in enchant.Game#fps, the frame in
* enchant.Game#currentScene will be updated. When a preloaded image is present,
* loading will begin and the loading screen will be displayed.
*/
start: function() {
if (this._intervalID) {
window.clearInterval(this._intervalID);
} else if (this._assets.length) {
if (enchant.Sound.enabledInMobileSafari && !game._touched &&
VENDER_PREFIX == 'webkit' && TOUCH_ENABLED) {
var scene = new enchant.Scene();
scene.backgroundColor = '#000';
var size = Math.round(game.width / 10);
var sprite = new enchant.Sprite(game.width, size);
sprite.y = (game.height - size) / 2;
sprite.image = new enchant.Surface(game.width, size);
sprite.image.context.fillStyle = '#fff';
sprite.image.context.font = (size-1) + 'px bold Helvetica,Arial,sans-serif';
var width = sprite.image.context.measureText('Touch to Start').width;
sprite.image.context.fillText('Touch to Start', (game.width - width) / 2, size-1);
scene.addChild(sprite);
document.addEventListener('touchstart', function() {
game._touched = true;
game.removeScene(scene);
game.start();
}, true);
game.pushScene(scene);
return;
}
var o = {};
var assets = this._assets.filter(function(asset) {
return asset in o ? false : o[asset] = true;
});
var loaded = 0;
for (var i = 0, len = assets.length; i < len; i++) {
this.load(assets[i], function() {
var e = new enchant.Event('progress');
e.loaded = ++loaded;
e.total = len;
game.dispatchEvent(e);
if (loaded == len) {
game.removeScene(game.loadingScene);
game.dispatchEvent(new enchant.Event('load'));
}
});
}
this.pushScene(this.loadingScene);
} else {
this.dispatchEvent(new enchant.Event('load'));
}
this.currentTime = Date.now();
this._intervalID = window.setInterval(function() {
game._tick()
}, 1000 / this.fps);
this.running = true;
},
/**
* Begin game debug mode.
*
* Game debug mode can be set to on even if enchant.Game.instance._debug flag is set to true.
*/
debug: function() {
this._debug = true;
this.rootScene.addEventListener("enterframe", function(time){
this._actualFps = (1 / time);
})
this.start();
},
actualFps: {
get: function(){
return this._actualFps || this.fps;
}
},
_tick: function() {
var now = Date.now();
var e = new enchant.Event('enterframe');
e.elapsed = now - this.currentTime;
this.currentTime = now;
var nodes = this.currentScene.childNodes.slice();
var push = Array.prototype.push;
while (nodes.length) {
var node = nodes.pop();
node.dispatchEvent(e);
node.age ++;
if (node.childNodes) {
push.apply(nodes, node.childNodes);
}
}
this.currentScene.dispatchEvent(e);
this.dispatchEvent(e);
this.dispatchEvent(new enchant.Event('exitframe'));
this.frame++;
},
/**
* Stops game.
*
* The frame will not be updated, and player input will not be accepted.
* Game can be reopened in enchant.Game#start.